CVE-2026-103286: Ghost 2.21.0 before 6.56.0 Privilege Escalation via Notifications

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-01
Weakness: CWE-266

Description

Ghost versions from 2.21.0 before 6.56.0 contain a privilege escalation vulnerability in the notifications system that allows low-privilege staff users to escalate to higher-privilege staff roles. Attackers with low-privilege staff access can exploit the notifications system to gain elevated privileges without proper authorization checks.

Affected products

TryGhost Ghost: from 2.21.0 before 6.56.0 — fixed in 6.56.0

How to fix

Upgrade to a fixed version: TryGhost Ghost 6.56.0. Check the vendor advisory for mitigations.

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-pv24-pfvg-vr83
https://www.vulncheck.com/advisories/ghost-2.21.0-before-6.56.0-privilege-escalation-via-notifications

Get alerted when CVE-2026-103286 or the next vulnerability affects your stack